Solicitação de exame técnico
#4.1
05/05/1987
RPI 863
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Official data from INPI
PROCESSO DE TÊMPERA, COM RESFRIAMENTO BRUSCO, NO TRATAMENTO A QUENTE DE METAIS
Em AnáliseInvention Patent
Application data
Number
PI8406891Type
Invention Patent
Filing
05/16/1984
Publication
04/16/1985
Progress at the INPI
- Filing05/16/84
- Publication04/16/85
- Examination05/05/87
- Allowance08/28/90
- Grant03/26/91
- Expired07/08/08
The letters patent expired on 07/08/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.
Talk to a specialistLatest action published by the INPI: 05/05/1987. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
E.F. Houghton & Co.
US
Inventors
J. W. (pessoa física)
US
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Notificação de entrada na fase nacional - PCT
#1.3
04/16/1985
RPI 756
Carta-patente expirada
#21.1
Patente extinta em 16/05/99
07/08/2008
RPI 1957
Concessão da patente
#16.1
03/26/1991
RPI 1060
Notificação para pagamento de retribuição
#13.1
12/11/1990
RPI 1045
Deferimento
#9.1
08/28/1990
RPI 1030
Exigência - art. 36 da LPI
#6.1
03/06/1990
RPI 1008
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